\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{ZINB model for EU CETA and TTIP leaks \label{zinb\_leaks}}
\begin{tabular}{l*{1}{c}}
\hline\hline
                &\multicolumn{1}{c}{(1)}\\
                &\multicolumn{1}{c}{EU-Attributed Leaks}\\
                &     b/se         \\
\hline
EU-Attributed Leaks&                  \\
Mean Right-Left &    -0.24\sym{**} \\
                &   (0.12)         \\
Mean R-L Political Polarization&     0.15\sym{**} \\
                &   (0.07)         \\
Constant        &    -7.97\sym{***}\\
                &   (3.09)         \\
\hline
inflate         &                  \\
Monthly CETA and TTIP negotiations&    -2.27         \\
                &   (3.89)         \\
Mean protectionist sentiment&    -9.13         \\
                &   (6.18)         \\
Constant        &     2.64         \\
                &   (1.73)         \\
\hline
/               &                  \\
lnalpha         &   -19.92         \\
                &(1324.56)         \\
\hline
N               &      117         \\
R-squared       &                  \\
\hline\hline
\multicolumn{2}{l}{\footnotesize \sym{*} \(p<0.10\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\)}\\
\end{tabular}
\end{table}
